Uniform Title Memorandum of Understanding between the Government of the United States of America and the Government of the Republic of Ecuador Concerning the Imposition of Import Restrictions on Categories of Archaeological and Ethnological Material of Ecuador (2019 May 22) Title Cultural exchanges, property, and cooperation : import restrictions : memorandum of understanding between the United States of America and Ecuador, signed at Quito, May 22, 2019; entered into force February 11, 2020.